东北地区春玉米气候适宜度模型

农作物生长是一个连续的动态过程，因而作物生长的最适宜气象指标也是连续变化的.据此，本文提出作物生长日可利用降水量的推算方法和气象指标时间插值算法，构建了日尺度气候适宜度模型，利用东北地区农业气象站的多年玉米观测资料进行检验.结果表明： 模型计算的气候适宜度与株高、百粒重存在显著正相关；在春玉米营养生长期间，气候适宜度与株高的相关系数(R²)在0.58以上；春玉米生殖生长期间，气候适宜度与春玉米百粒重的R²在0.45以上.本文建立的日尺度气候适宜度模型能客观地反映营养生长阶段及生殖生长阶段作物与气候条件的相互作用关系.

Climatic suitability model for spring maize in Northeast China.

Crop growth is a continuous and dynamic process, and thus, the optimal meteorological indices for crop growth also change continuously. In this paper, the estimation algorithms of the daily available precipitation and the temporal interpolation methods of meteorological indices for crop growth were developed, and the climatic suitability model at daily scale was established, which was tested by the spring maize data of agro-meteorological stations in Northeast China. The simulated climatic suitability had significantly positive correlations with the height and 100-grain mass of spring maize. The correlation coefficient (R2) between the climatic suitability and the spring maize height was over 0.58 at vegetative growth stage, and over 0.45 at reproductive growth stage. The established climatic suitability model at daily scale could objectively reflect the interactions between crop growth and meteorological factors at vegetative growth stage and reproductive growth stage.